Dokumentation der VJBL1.2: Class DigitalMeter

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vipratech.beans.standardbeans
Class DigitalMeter

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Canvas
              |
              +--vipratech.beans.standardbeans.DigitalMeter

public class DigitalMeter
extends java.awt.Canvas
implements InterfaceProperties

The DigitMeter.class is a GUI component used to dynamically display values using an LED or LCD digital type meter display composed of seven-element digits. Each element in the digit can either be active or inactive.

The value of the meter is set using the setValue(float value) method or by wiring the meter up to adjustment event sources at design time. For example, the meter can be wired up to standard java.awt.Scrollbar components or to vipratech.beans.HorizontalSlider, or vipratech.beans.VerticalSlider.

If the meter is to display negative values, then an extra digit should be added at design time to display the minus sign.

The value of the meter may also be set using a property change event. For example, the meter may be wired up to vipratech.beans.SimpleDataSource at design time.

Each digit in the meter is an instance of the vipratech.beans.Digit object.

Version:: 1.03, June 13, 2002
Author:: Warwick Bailey warwick-bailey@bigfoot.com
See Also:: MeterSupport, Digit, Serialized Form

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT,  
CENTER_ALIGNMENT,  
LEFT_ALIGNMENT,  
RIGHT_ALIGNMENT,  
TOP_ALIGNMENT

Constructor Summary
`DigitalMeter()`

Method Summary
`void`	`adjustmentValueChanged(java.awt.event.AdjustmentEvent event)` Method for receiving adjustment events.
`void`	`destroy()` Cleans up offscreen graphics.
`java.awt.Color`	`getActive()` Returns the color of the active digit elements.
`boolean`	`getBevel()` Returns the toggle of 3D edge effect on the border.
`int`	`getBorder()` Returns the background color of the meter.
`java.awt.Color`	`getInactive()` Returns the color of the inactive digit elements.
`float`	`getInitValue()` Returns the start and reset value to be displayed in the meter.
`boolean`	`getInterfaceColors()` Returns the toggle for the colors to match the current interface..
`java.awt.Color`	`getMeterColor()` Returns the background color of the meter.
`java.awt.Dimension`	`getMinimumSize()` Returns the minimum meter size.
`boolean`	`getNegatives()` Returns the toggle for negative numbers.
`int`	`getNumberOfDigits()` Returns the number of digits to be displayed.
`int`	`getPlaces()` Returns the number of decimal places to be displayed.
`java.lang.String`	`getUnit()` Returns the unit to be displayed.
`float`	`getValue()` Returns the value to be displayed in the meter.
`void`	`paint(java.awt.Graphics g)` Updates of screen image, then draw image to screen.
`void`	`propertyChange(java.beans.PropertyChangeEvent event)` Method to receive property change events.
`void`	`reset()` Resets the meter to the initial value.
`void`	`setActive(java.awt.Color active)` Sets the color of the active digit elements.
`void`	`setBevel(boolean bevel)` Toggle 3D edge effect on the border.
`void`	`setBorder(int border)` Sets the border size of the meter.
`void`	`setInactive(java.awt.Color inactive)` Sets the color of the inactive digit elements.
`void`	`setInitValue(float initValue)` Sets the start and reset value to be displayed in the meter.
`void`	`setInterfaceColors(boolean interfaceColors)` Toggle the colors to match the current interface.
`void`	`setMeterColor(java.awt.Color meterColor)` Sets the background color of the meter.
`void`	`setNegatives(boolean negatives)` Toggle display of negative numbers.
`void`	`setNumberOfDigits(int numberOfDigits)` Sets the number of digits to be displayed.
`void`	`setPlaces(int places)` Sets the number of decimal places to be displayed.
`void`	`setUnit(java.lang.String unit)` Sets the unit to be displayed.
`void`	`setValue(float value)` Sets the value to be displayed in the meter.
`void`	`stop()` Freezes the meter at the current value.
`void`	`update(java.awt.Graphics g)` Overidden method to avoid flickering during repaint.

Methods inherited from class java.awt.Canvas

addNotify

Methods inherited from class java.awt.Component

action, 
add, 
addComponentListener, 
addFocusListener, 
addInputMethodListener, 
addKeyListener, 
addMouseListener, 
addMouseMotionListener, 
addPropertyChangeListener, 
addPropertyChangeListener, 
bounds, 
checkImage, 
checkImage, 
contains, 
contains, 
createImage, 
createImage, 
deliverEvent, 
disable, 
dispatchEvent, 
doLayout, 
enable, 
enable, 
enableInputMethods, 
getAlignmentX, 
getAlignmentY, 
getBackground, 
getBounds, 
getBounds, 
getColorModel, 
getComponentAt, 
getComponentAt, 
getComponentOrientation, 
getCursor, 
getDropTarget, 
getFont, 
getFontMetrics, 
getForeground, 
getGraphics, 
getHeight, 
getInputContext, 
getInputMethodRequests, 
getLocale, 
getLocation, 
getLocation, 
getLocationOnScreen, 
getMaximumSize, 
getName, 
getParent, 
getPeer, 
getPreferredSize, 
getSize, 
getSize, 
getToolkit, 
getTreeLock, 
getWidth, 
getX, 
getY, 
gotFocus, 
handleEvent, 
hasFocus, 
hide, 
imageUpdate, 
inside, 
invalidate, 
isDisplayable, 
isDoubleBuffered, 
isEnabled, 
isFocusTraversable, 
isLightweight, 
isOpaque, 
isShowing, 
isValid, 
isVisible, 
keyDown, 
keyUp, 
layout, 
list, 
list, 
list, 
list, 
list, 
locate, 
location, 
lostFocus, 
minimumSize, 
mouseDown, 
mouseDrag, 
mouseEnter, 
mouseExit, 
mouseMove, 
mouseUp, 
move, 
nextFocus, 
paintAll, 
postEvent, 
preferredSize, 
prepareImage, 
prepareImage, 
print, 
printAll, 
remove, 
removeComponentListener, 
removeFocusListener, 
removeInputMethodListener, 
removeKeyListener, 
removeMouseListener, 
removeMouseMotionListener, 
removeNotify, 
removePropertyChangeListener, 
removePropertyChangeListener, 
repaint, 
repaint, 
repaint, 
repaint, 
requestFocus, 
reshape, 
resize, 
resize, 
setBackground, 
setBounds, 
setBounds, 
setComponentOrientation, 
setCursor, 
setDropTarget, 
setEnabled, 
setFont, 
setForeground, 
setLocale, 
setLocation, 
setLocation, 
setName, 
setSize, 
setSize, 
setVisible, 
show, 
show, 
size, 
toString, 
transferFocus, 
validate

Methods inherited from class java.lang.Object

equals, 
getClass, 
hashCode, 
notify, 
notifyAll, 
wait, 
wait, 
wait

Constructor Detail

DigitalMeter

public DigitalMeter()

Method Detail

adjustmentValueChanged

public void adjustmentValueChanged(java.awt.event.AdjustmentEvent event)

Method for receiving adjustment events. This is the target method when wiring up the meter to sources of adjustment event object (such as scrollers and scroll bars) at design time.

paint

public final void paint(java.awt.Graphics g)

Updates of screen image, then draw image to screen.

Overrides:: paint in class java.awt.Canvas

update

public final void update(java.awt.Graphics g)

Overidden method to avoid flickering during repaint.

Overrides:: update in class java.awt.Component

propertyChange

public final void propertyChange(java.beans.PropertyChangeEvent event)

Method to receive property change events. This method should accept property change events of objects of type Float

reset

public final void reset()

Resets the meter to the initial value.

stop

public void stop()

Freezes the meter at the current value.

destroy

public final void destroy()

Cleans up offscreen graphics. This method should be called when the applet or application closes down.

getMinimumSize

public final java.awt.Dimension getMinimumSize()

Returns the minimum meter size. The minimum size is set to 150 x 50 pixels.

Overrides:: getMinimumSize in class java.awt.Component

setValue

public final void setValue(float value)

Sets the value to be displayed in the meter.

getValue

public final float getValue()

Returns the value to be displayed in the meter.

setInitValue

public final void setInitValue(float initValue)

Sets the start and reset value to be displayed in the meter.

getInitValue

public final float getInitValue()

Returns the start and reset value to be displayed in the meter.

setNumberOfDigits

public final void setNumberOfDigits(int numberOfDigits)

Sets the number of digits to be displayed.

getNumberOfDigits

public final int getNumberOfDigits()

Returns the number of digits to be displayed.

setPlaces

public final void setPlaces(int places)

Sets the number of decimal places to be displayed.

getPlaces

public final int getPlaces()

Returns the number of decimal places to be displayed.

setActive

public final void setActive(java.awt.Color active)

Sets the color of the active digit elements.

getActive

public final java.awt.Color getActive()

Returns the color of the active digit elements.

setInactive

public final void setInactive(java.awt.Color inactive)

Sets the color of the inactive digit elements.

getInactive

public final java.awt.Color getInactive()

Returns the color of the inactive digit elements.

setMeterColor

public final void setMeterColor(java.awt.Color meterColor)

Sets the background color of the meter.

getMeterColor

public final java.awt.Color getMeterColor()

Returns the background color of the meter.

setUnit

public final void setUnit(java.lang.String unit)

Sets the unit to be displayed.

getUnit

public final java.lang.String getUnit()

Returns the unit to be displayed.

setBorder

public final void setBorder(int border)

Sets the border size of the meter.

getBorder

public final int getBorder()